text: Stephanopoulos began his career as an assistant professor of chemical engineering at the California Institute of Technology in 1978. He was promoted to associate professor in 1978. In 1985, he was hired by the Massachusetts Institute of Technology as professor of chemical engineering. During his time at MIT, he has held the following positions:  associate director, Biotechnology Center (1990-1997), professor of the MIT-Harvard Division of Health Science and Technology - HST (2000–Present), Bayer Professor of Chemical Engineering and Biotechnology (2000 - 2005), and the W. H. Dow Professor of Chemical Engineering and Biotechnology (2006–Present). From 2006 to 2007, he was a visiting professor at the Institute for Chemical and Bioengineering in Zürich, Switzerland.
  As noted in the citation for his ENI Prize, Stephanopoulos's research has addressed the advancement of multiple aspects bioengineering: